A recent Gallup study discovered something odd: Teams with fewer than 10 members have the highest and the lowest levels of engagement in Gallup’s database.

Our scientists say this illustrates how easily smallish teams can be swayed in one direction or the other.

Of course, all teams can be influenced — but the fewer the direct reports, the greater the manager’s impact for good or ill.Most teams are far larger than that, and though managers can’t always dictate team size, they still affect 70% of the variance in their team’s engagement regardless of size.

To extend their influence over a large group and ensure workers are engaged, developing, and using their strengths every day, managers might find that the “5 Cs” — common purpose, connection, communication, collaboration, and celebration — provide a handy blueprint.